A marine invertebrate belonging to the Phylum Cnidaria, which also includes jellyfish and sea anemones. Colonial corals consist of large numbers of polyps, living in calcium carbonate skeletons that they collectively secrete.
A marine invertebrate belonging to the Phylum Cnidaria, which also includes jellyfish and sea anemones. Colonial corals consist of large numbers of polyps, living in calcium carbonate skeletons that they collectively secrete.